cog/Frameworks/libsidplay/sidplay-residfp-code/readSID.pl

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Perl
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#!/usr/bin/perl
#use strict;
use Fcntl;
use Digest::MD5;
my $file_name = $ARGV[0];
sysopen my $bin, $file_name, O_RDONLY | O_BINARY or die "can't open file: $!";
sysread $bin, my $header, 4;
print "File Format: " . $header . "\n";
my $rsid = $header == 'RSID';
sysread $bin, my $version, 2;
print "Format Version: " . unpack("n", $version) . "\n";
# This is the offset from the start of the file to the C64 binary data area.
# Because of the fixed size of the header, this is either 0x0076 for version 1
# and 0x007C for version 2 and 3.
sysread $bin, my $dataOffset, 2;
printf "Data offset: \$%04x\n", unpack("n", $dataOffset);
# The C64 memory location where to put the C64 data. 0 means the data are in
# original C64 binary file format, i.e. the first two bytes of the data contain
# the little-endian load address (low byte, high byte). This must always be true
# for RSID files. Furthermore, the actual load address must NOT be less than
# $07E8 in RSID files.
sysread $bin, my $loadAddress, 2;
if (unpack("n", $loadAddress) > 0) {
if ($rsid) {
printf "Broken RSID tune, laod address must be 0 but was: \$%04x\n", $loadAddress
}
else {
printf "Load Address: \$%04x\n", unpack("n", $loadAddress);
}
}
sysread $bin, my $initAddress, 2;
printf "Init Address: \$%04x\n", unpack("n", $initAddress);
sysread $bin, my $playAddress, 2;
printf "Play Address: \$%04x\n", unpack("n", $playAddress);
sysread $bin, my $songs, 2;
printf "Number of tunes: %d\n", unpack("n", $songs);
sysread $bin, my $startSong, 2;
printf "Default tune: %d\n", unpack("n", $startSong);
sysread $bin, my $speed, 4;
printf "Speed: \$%08x\n", unpack("N", $speed);
sysread $bin, my $name, 32;
printf "Title: %s\n", $name;
sysread $bin, my $author, 32;
printf "Author: %s\n", $author;
sysread $bin, my $released, 32;
printf "Released: %s\n", $released;
if (unpack("n", $version) > 1) {
sysread $bin, my $binflags, 2;
my $flags = unpack("n", $binflags);
printf "MUS: %s\n", ($flags & 0x01)?"true":"false";
if ($header == "PSID") {
printf "PlaySID Specific: %s\n", ($flags & 0x02)?"true":"false";
} else {
printf "BASIC: %s\n", ($flags & 0x02)?"true":"false";
}
my %clock = (
0b00 => "Unknown",
0b01 => "PAL",
0b10 => "NTSC",
0b11 => "PAL and NTSC"
);
printf "Clock: %s\n", $clock {($flags & 0x0C) >> 2};
my %model = (
0b00 => "Unknown",
0b01 => "6581",
0b10 => "8580",
0b11 => "6581 and 8580"
);
printf "SID Model: %s\n", $model {($flags & 0x30) >> 4};
if (unpack("n", $version) > 2) {
printf "2nd SID Model: %s\n", $model {($flags & 0xC0) >> 6};
if (unpack("n", $version) > 3) {
printf "3rd SID Model: %s\n", $model {($flags & 0x300) >> 8};
}
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}
sysread $bin, my $startPage, 1;
printf "Start Page: \$%02x\n", unpack("C", $startPage);
sysread $bin, my $pageLength, 1;
printf "Page Length: \$%02x\n", unpack("C", $pageLength);
sysread $bin, my $secondSIDAddress, 1;
sysread $bin, my $thirdSIDAddress, 1;
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if (unpack("n", $version) > 2) {
printf "2nd SID Address: \$D%02x0\n", unpack("C", $secondSIDAddress);
if (unpack("n", $version) > 3) {
printf "3rd SID Address: \$D%02x0\n", unpack("C", $thirdSIDAddress);
}
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}
}
if (unpack("n", $loadAddress) == 0) {
sysread $bin, my $realLoadAddr, 2;
if ($rsid && unpack("v", $realLoadAddr) < 0x07E8) {
printf "Broken RSID tune, laod address must be at least \$07E8 but was: \$%04x\n", $realLoadAddr
}
else {
printf "Load Address: \$%04x\n", unpack("v", $realLoadAddr);
}
}
# Calculate md5 sum
my $ctx = Digest::MD5->new;
# Include C64 data
my $offset = unpack("n", $dataOffset);
if (unpack("n", $loadAddress) == 0) {
$offset += 2;
}
sysseek $bin, $offset, SEEK_SET;
do {
my $datalen = sysread $bin, my $buffer, 65536;
$ctx->add($buffer);
} while ($datalen > 0);
# Include INIT and PLAY address
$ctx->add(pack("v", unpack("n", $initAddress)));
$ctx->add(pack("v", unpack("n", $playAddress)));
# # Include number of songs
$ctx->add(pack("v", unpack("n", $songs)));
# Include song speed for each song
my $mask = 1;
for (my $i = 1; $i <= unpack("n", $songs); $i++, $mask <<= 1) {
if (unpack("N", $speed) & $mask) {
$ctx->add(pack("c", 1));
} else {
$ctx->add(pack("c", 0));
}
}
# Include clock speed flags
if (($flags & 0x0C) >> 2 == 0b10) {
$ctx->add(ack("c", 2));
}
print $ctx->hexdigest;
print "\n";
close $bin;